Electromagnetic valve



INVENTOR.

Jan. 8, 1929.

L. O. FRENCH ELECTROMAGNETIG VALVE Filed Jan. 10,' 1927 broken away. n

In the drawings ,the numeral 6 designates.

Patented Jain.- 8, '1929.

LOUIS o. FRENCH, or MILWAUKEE, WISCONSIN.

ELECTROMAGNETIG VALVE.

'Application led January 10, 1927. Serial No. 160,178.

cally-operated valves, and more particularly to an electromagnetic -valve 'suitable-.for use as a fuel-metering valve inthe fe'ul-feeding or fuel-injection *systems of internal combustion engines to control directlyvor indirectly the amount of vfuel supplied ,to the en- 1ne. g The object of th'epresent invention is to provide an efficient and simple means for accurately controlling thelift ofthe electromagnetic valve by stop means engageable with the armature on the valve while the valve is in assembled position,-and more particularly to provide a control operable from the exterior of the device so that the valve maybe adjusted while in operation. The invention is shown as incoiporated inthe valve structure of my co ending'application Serial The invention relates to electromagneti- No. 111,775, filed May 26,' 1926, now Patent No. 1,664,616, issued April`3,- 1928'l wherein certainfeatures of construction are more particularly described and claimed.

The invention further consists in the sev'- eral features hereinafter set forth and more vparticularly defined by claims at theconclusion hereof., f

In the drawings Fig. 1 is a vertical section-- al View of a valve embodying the invention;

Fig. 2 is a detail elevation View of a part of the device;

Fig. 3 is a detail vertical sectional view of a modified form of the device,

the ,electromagnet which has a centrally disposed core 7 with a conically tapered inner pole 8 at one end, aV threaded Iiange 9, a central fuel' passage or bore 10,- and a small bore 11 communicating with said passage 10. -1 An outer pole member12 surrounds the'inner pole and is formed integral with or connected to a return magnetic iu'x path-portion L 1 3 having a ring portion 14 provided witha threaded bore 15 to yreceive thethreads of the flange 9. A suitablyinsulated energizing coil 16 surrounds the core between thel outer pole and the flange 9.

A sealing gasket 17' of non-magnetic material is interposed between .the tapered end of the core and the tapered end of the outer pole and is clamped thereto in a` fluid-tight manner by pressure exerted through the core and its threaded connectionwith the portion 14, thus providing a fluid-'tight pole face.

A threaded tubular portion 18 is associated parts being with the outer pole and receives and is engaged by theupperthreaded end of a clamping member 19 which has a shoulder against which aplate y29-'fabuts,'a 'conical'lowerend 21 and centrally disposed alined bores 22 and 23 forming a shoulder 24 and a threaded bore 25 in which the valve seat member 26 is mounted.

and at-its upperend against the lower side of the outer pole Within an annular center 'ing recess 30 formed therein and these seating faces are tightly clamped togetherfby the clamping member19l exeting pressure.

thereon through theiiange or shoulder 24.

'The casing member 28 has alined bores 31 and 32 and a passage 33 connecting the bore 3l withl the space 34 provided by the bore 23 of the member 19. A control valve 35 has its stem guided in the bore 32 and an armature 36 working in the bore 31 and its pointed end engages the valve seat member 26 and controls the How of fuel Athrough the passage 27.

In additionto the fuel pressure acting on the val-ve a spring37, interposed between the lower end of the member 28 and a stop 38 formed by a Cotter pin, is preferably provided to'normally urge the valve to its seat.

The length of the casing member 28, or this lengthtogether with the nurgnber and thickness ofthe shims 29, determines the distance of the upper .face of the. armature from the pole face andvhence the maximum lift of thevalve.. While the member 28 may be used alone it is preferred to use the shims in connection .therewith so that if the valve or its seat wears, thus decreasing the actual or efj f ective length of the valve, one or more of the shims may be removed to bring -about the poles which it bridges as the lines o f force flow across. the air-gap therebetween and the valve is lifted off its seat against the action of the spring 37. When the valve lifts off its seat fuel `passing through the bores l0, 11, 31, passa-ge 33 and space 34 .issues througlrthe vnozzle passage 27 into the engine cylinder 39' in which the conical end 21v of the member 19 is mounted and to which-it is clamped by' the studs 40 and nuts 41 associated with the plate 20. .v

Where the engine is of the multi-cylinder type, -it is highly desirable to have'all the valves lift the same amount so as to provide for an equal supply of fuel to all the cylinders and for this purpose I have provided a stop Y ad'ustable to limit thel lift of the valve.

f purpose in Fig.

vby

j such as brass, bronze or tungsten inset in the armature 36, said end being' bevelled so as to increase the effective pole face area where the rod 42 is of magnetic material and the effective area of the armature surface is also increased by the use of-a small pin 46 though vthe rod o'r its lower end may be of non-magnetic material. This rod is preferably ladjustable from outside the core or the pipe connections associated therewith-and for this 1 I 'have' provided an extension 47 of the core having a bore forming a chamber 48 therein alined with the bore 10, an annularshoulder 49, a threaded bore 50, and a fuel supply pipe passage 51. 'A exible metal diaphragm 52, such as a single flexible metal plate .or a number 'of lamina-` tions, seats on the shoulder 49 and is clamped in positionover the open end of the bore 48 a nut 54 in threaded engagement 'with'.

- the threaded bore 50. The upper end of the 'Thus the spring pole face so as'to limit the liftin (i5 rod 42 is held against the central part of the diaphragm by a spring 55 interposed between the block 43 and a stopfcollar 56 on said rod.

55 holds the rod for movement by the flexing of the central portion of the diaphragm and this is accomplishedby a cap-'nut 57 having an adjustable threaded connection at 58 with the exterior of'said extension, with a projection 59 working through an opening 6() in the nut 54 and engaging the 1 outer side of the central portion of the diaphragm whereby turning" of saidlnutlserves to depress the central portion of the diaphragm and hence project the lower end of the rod the desired distance beyond the movement of the valve. The nut 57 and t e exten-A erated, may be sion may be provided with a micrometric scale and for this purpose the outer face of the nut hassubdividing lines 61..thereon, reading in thousandths, cooperating with an index lline'62 on the extension. With this 70 construction the nut 57 is turned to depress the diaphragm until the lower end of the stop rod- 42 engages the Cblock or pin 46 of the valve which is either then in closed position or is moved to closed position by said rodjand the position of the line 62 relative tothe division lines 61 is noted. Then the nut 57 is turned back so as to bring the stop rod a predetermined distance above the armature, as shown by the micrometer scale reading and the nut is then locked against accidental turning by a screw 63 carried thereby and movable intoengagement with the-nut 54.

In the modification shown in Fig.'3 the stop-rod 64 extends through the bores 10 85 and 11 and has athreaded portion65 engaging a threaded bore in an extension 66 of the core of the magnet. The lower end of this stop member is provided with grooves` 67 for the-passage of fuel. The'upper end of the 90 `stop member 64 works through a stuling-box including a packing 68, follower 69 and gland-nut 70, and has a handwheel 71 mounted thereon toswhich an index pointer 72 is secured cooperating with a scale-similar to that shown on thel cap member of Figs. 1 and 2.

' With this construction as the rod 64 is rotated by turning the handle 01" knob 1 in the proper direction it moves closerl to the face of the armature and in this manner the 10o height of the stop vabove the armature, when the valve is closed, may be readilyV determined by the extent of movement of the rod.

Since the other parts ofthe magnet and the i valve structure are the same as those previously described further description thereof is deemed unnecessary. -f

It will be understood that the extension 47, shown in Fig. 1, of the extension 66 shown-in Fig. 3, may -be formed as a separate piece secured to the core and if so made may be of non-magnetic material, such as brassY or bronze. Furthermore, the exterior adjusting means, in addition to being manually-opconnected in any suitable manner for operation by the governor of the en'- gine,if desired.

I desire it to be understood that this invention is not to be limited to any particular form or arrangement of parts except as such limitations are specified in the claims.

What I claim as myinvention is:

1. In an electromagnetic valve, the combination of an electromagnet including a pole` member provided with a bore, a valve casing associated with said magnet, a valve working insaid casing and having an armature cooperating with said magnetfand an adjustable stop dis osed in said bore and projecting beyond t ve pole face of said member to engage said armature to limit the'lift of said valve. 2. In an electromagnetic valve, the combination of an electromagnetincluding a pole member provided with a bore, a valve casing associated withvsaid magnet, a valve working in said casing and having an armature cooperating With said magnet, an adjustable stop disposed in `said bore and projecting beyond the pole face oi' said member to limit the lift of said valve, and means for adj-ust- `ing the position of said stop operable from netic material slidably mounted therein and. projecting beyond the pole face of said mem-` ber to engage said non-magnetic central portion of said armature to limit the lift of said valve.,

4. In an electromagnetic valve, the combi-r nation of an electromagnet having a passage therein, a valve casing associated with said magnet, al valveworking in said casingand having an armature cooperating Withlsaid magnet, an' adjustablestop rod extending through said passage and engageable with said armature to limit the lift of said valve,-

.a Vdiaphragm associated with said rod,l and meansexterior of said passage ,for moving s aid diaphragm to adjustvthe position of said rod.

5. In an electromagnetic valve, the combi: nation of an electromagnet having a passage therein, a valve casing associated with the magnet, a valve Working in said vcasing and having an armature cooperating with said magnet, an adjustable stop rod extending through said passage and engageable with said armature to limit the lift of said valve,

a diaphragm associated With said rod, and

micrometrica'lly adj ustable means exterior 'of said passage -for flexing said diaphragm to adgust the position of said rod.

In an electromagnetic valve, the combination of an electromagnet including a pole member provided with a. bore, a valve casing associated with said magnet, a valve working in said casing and having an armature cooperating with said magnet, an/ adjustable `stop disposed in said bore and rojecting beyond the pole face of said mem er to engage a cooperative stop on sald armature, one

of said stops being of non-ma netic material;

7. In an electromagnetic va ve, the combination of an ironclad electromagnethaving a pole at one end, a valve having an armature cooperating `With said pole, a casing member in which the .armature is mounted and in which said valve is guided aclamping member detachably secured to said pole and provided with an annular shoulder for clamping said casing member in sealing engagement with said pole at one end and with 4said clamping member at its otherend, said clamping member having a bore extending from' said .casing member and having an opening controlled by said valve. A

In testimony whereof, I aiix my signature.

Louis o.` FRENCH.- 

